The SS-180 Pollack submarine was commissioned into service in Jan 1937. In 1937, she was assigned to the U.S. west coast and in 1941, when the Pacific War began was relocated to Pearl Harbor. Upon arriving at Pearl Harbor two days after the attack, she was immediately dispatched to Japanese waters; and became the first of three American warships in Japanese waters in the Pacific War. On January, 7 1942, USS Pollack sank Japanese cargo ship Unkai Maru No. 1 and became the first US Navy Pacific Fleet submarine to achieve a confirmed kill. The Pollack went on 11 war patrols in the Pacific War between 1941 and 1944 and would earn ten battle stars for her successful war tenure. Eventually in 1945, the SS-190 transitioned to a training submarine and by the end of the year she was decommissioned then sold for scrap in 1947.